The Auschwitz Museum has criticised Mattie McGrath for comparing Covid certificates to Nazi Germany.
Two Government TDs have declined to reveal if they will take a Covid-19 vaccine.
Independent TDs Mattie McGrath and Michael Healy Rae have held that their vaccination status is their private business.
Asked by reporters if he had taken a Covid-19 vaccine, Mr McGrath compared the country to 1930s Nazi Germany.
“That’s that question that I’ve been asked, but I said, that’s another area of constitutional rights, your bodily integrity,” he said.
“We had a situation a couple of years ago, in the Repeal situation, where the main slogan was ‘my body, my choice’.
“So it’s my body, my choice, and it’s a matter between me and my GP.”
When an Irish Examiner journalist challenged Mr McGrath over the cooments, he replied: If you study history and I'm not a historian, you can see what happened in Germany.
"There is huge correlations, it's exactly the same if you want to study it, exactly the same, restriction of movements, couldn't go where they wanted to go, treated like.
“I'm comparing what went on in early Germany and the people had such fear and that's what happened, so I am comparing, yeah, that's for me to compare and for anyone else who wants to read history, make their own decisions on it.”
Mr McGrath previously compared taxi men not being able to protest during the pandemic to “Nazi Hitler times”.
The Auschwitz Museum took to social media to criticise Mr McGrath's comments.
"Instrumentalization of the tragedy of all people who between 1933-45 suffered, were humiliated, tortured & murdered by the hateful totalitarian regime of Nazi Germany to argue against vaccination that saves human lives is a sad symptom of moral and intellectual decline," the account said.
The account then directed Mr McGrath to: 'Holocaust – the destruction of European Jews’ a seven-lesson free online course about the history of the Holocaust.'
@mattiemcgrathtd ‘Holocaust–the destruction of European Jews’
A seven-chapter online course about the history od the #Holocaust.
All parts below.https://t.co/Law3fQRRMS— Auschwitz Memorial (@AuschwitzMuseum) July 13, 2021
The Taoiseach addressed Mr McGrath's comments in the Dáil.
Micheál Martin said: "I think you should refrain from your frequent use of language and I've asked you to stop using terms Nazis and totalitarianism, you've made ridiculous assertions in this house and that are offensive to people.
“You have repeatedly accused the government of being like Nazis, in this house.”